Mechanically-actuated hammer.



0. JOHNSON.

MECHANICALLY ACTUATED HAMMER.

APPLICATION man APR.19, 1915,.

1,174,988. Y Patented Mar.14,1916.

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www' Md M www OSCAR JOHNSON, OF BOVEY, MIlNNESOIA.

MECHANICALLY-ACTUATED HAMMER.

Application mea April 19, i915.

' T 0 all whom it may concern :v n

' between them.

It is a further object of the invention to utilize the driving means of the Vhammers vments forY imparting motion to a grindstone or emery-wheel when desired. l Further objects and advantages of the invention will be set forth in the detailed description which now follows. Y

In the accompanying drawing: Figure 1 is a side elevation of a mechanically lactuated hammer constructed in accordance with the invention. Fig. 2 is a plan view thereof. Fig. 3 is a detail perspective view, and Fig. 4 is a modification. Y

Y Like numerals designate corresponding arts in all of the figures of the drawing.

Referring to the drawing, the numeral 5 designates an elongated bed-plate supported upon base pieces v6. Centrally arranged upon the bed-plate 5 is an anvil of the eculiar form shown, comprising an intermediate body portion 6u, side plates 7, horn 8 and aremovable striking surface 9,' having depending side-plates 10 which are arrange to embrace the body 6a of the anvil. Sliding beneath the body of the anvil and disposed between the side-plates 7 thereof is a slidingplate 11 held in place by keepers 12. This plate 11 is provided with upstanding abut- 13 recessed as at 14 and having openings 15 formed therein. 1t will be noted that the bottoms of the recesses 14 are inclined, the purpose of whichit is apparent' is to conform to the position in which the hammers lie when they are raised (see Fig. 1). The hammers are indicated at 1G and 17. They are provided with bent helvcs 13 and 19 and are pivotally connected at 20 and 21 to the bed-plate 5. When the slidingplate 11 is moved in one direction the vertical walls 22 at the inner ends of the slots Specification of Letters Patent.'

d the belt Lmounted bearings 3G to Patented Mar. 14, 1916. serial No. 22,461.

15' act to raise the 'hammers tothe `position 71":

in -which the hammer' 17 lies in Fig. 1,'"at which time the rear edge of the hammer helves rests upon the inclined bottom of the recess 14. lVhen the plate 11 is moved in,

the opposite direction the nose 23 'at the opposite end of the recess acts to throw the hammer over and strike a blow upon the anvil. For imparting reciprocatory movement yto sliding-plate 11 a connecting rod 24 is pivoted at 25 opposite Aend is pivoted to a crank 26 of a shaft 27 that is mounted in bearings 28. This shaft carriesl a pulley 29, a disk 30 and' a pulley 31. The diskL 30 is provided with a crank it be desired to drive Athe device by. power, a belt, not shown,

oger a pulley 34 that is carried by a shaft 3 handle 32 by which the shaft may'l be rotated by hand or it is apparent that may be applied to pulley 29. A belt 33 passes over thev pulley 31 andV The shaft 35 1s mounted yin bearing, standards 36 and carries an emery-wheel 37 and a grindstone 33. The bearing standards:

to the plate 11 andatvits j are carried by a sliding block 39 whichI passes beneath the bed-plate 5. A plate 40 spans the space between'the bearing standards and lies above bed-plate 5 by virtue of which lconstruction the bearing standards are slidably mounted with relation to the bedplate' 5 and when moved away from shaft 27 it is apparent that the belt 33 will bev moving the bearing tightened. For thus y standards 36 a lever 41 is pivoted at 42 in a cut-out portion 43 of the bed-plate 5 and a link 44'is connected to this lever and to the plate 40 so that when the handle is swung rearwardly or to the left,`in Fig. 1,v

33 will be tightened. A wire 45 bent to substantially U shape pivoted at 46 upon the bed-plate 5 acts as a pawl by engaging a notch 47 of lever 41 to hold this lever in position to keep the belt tightened during the time that it is desired to use either the emery-wheel 37 or the grindstone 38. A well or like receptacle 48 is carried by the block 39 and the lower edge of the grindstone depends therein. A hand grip 50 is pivoted at 51 upon the lever 41 and carries depending ends 52 arranged to engage and throw the wire pawl 45 out of the notch 47 when it is desired to release the slidably loosen the belt 33. The pivots 2O and 21 are composed of transversely extending rods which have braces 53 engaged therewith which braces i. 'are well adap'tedjto serve the function for which they are intended, it is to be understood pended claims.

that the invention is not to be .limited Vto the precise construction set forth, but that it includes. Within its purview whatever is new that comes within'the spirit of the ap- Having described my invention, what I claim is 'I l..I In a device of the the combination with mounted hammers, t an tween them, a slidably gaging s aid hammers in character described,

anvil disposed bemounted vplate envsuch manner as to K lmpart simultaneous swinging movement to them when reciprocated,

. carried thereby,

thus causing them with the anvil, and said plate.` character described, bed-plate, an anvil Y a pair of'hammers having bent `helves pivoted to said bed-plate, said anvil'being located between said hammers, a slidably mounted plate having openings therein through which the helvesV of said to alternately coperate means for reciprocating f2. In a device of the the combination with a hammers pass, and means for imparting relthe vcombination y mers having bent helves,

ciprocation to said slidably mounted plate. Vf3. In a device of the character described, with a bed-plate, of ham` the ends of which are pivoted'to 'said bed-plate, an anvil locatedin position to be struck'by said hammers, a slidably mounted plate having open- Cpies of this patent may. be obtained for ve cents each, by addressing the"CoJnmssioner-Yiof yIi'iatents,A i

a pair of pivotally ings therethrough, through which thehelves I of said hammers pass and guiding and bracing means connected to the hammer helves and engaging the pivots of the hammers outside ofY said bed-plate.

`4. In a device of the character described, theV combination with a bed-plate, of. hammers having bent helves, the ends of which are pivoted to said bed-plate, an anvil located in position to be struck by said lhamg mers, a slidably mounted plate .having openings therethrough, through 'which thef'helves of said hammers pass and guiding and brac'- ing means connectedto the hammer helves' and engaging the helves of said hammers and the heads of said hammers. Y

5. In a device of the character described, the combination with a bed-plate,a pair of hammers having bent helvesrpivoted thereto, an anvil carried thereby and disposed between said hammers` a slidably mounted plate, there being openings formed through said plate having substantially vertical inner walls and having their outer ends substantially as shown and described.

6. In a device of the the combination Vwith inclined portions at v character described, a bed-plateany anvil carried thereby, vapair of hammers having Y benthelves pivote'd to said bed-plate, said anvil .being located between said a slidably mounted plate having thereinV through which the helves hammers pass,

rocation to said slidablymounted plate, and

hammers, openings of said means for impartingV recizp Y' Y80 springs carriedl by said 'slidably mounted plate for cushioning the actionof said hammers. Y Y Q In testimony whereof I aix my signature Vin presence of two witnesses.

, Y, t OSCAR Jonsson.Y llVitnesses:V Y Y A Y I S. .RUNHELA, E. H. ,EITHER Washington, 11.0,. l 

